Printing-surface.



WITNESSES.

.I. I. HALLIWELL.

PRINTING SURFACE.

APPLICATION FILED JUNE I4. IBIS.

I ,,2%8,3 1 9, Patented. Nov. 27, 1917.

fi i- J as a i=1 LIWELL, OF NEW YORK, N. Y., ASSIGNOR TO B. HOE AND 00., 0F NEW YORK,

' N. Y., A CORPORATION OF NEW YORK.

rnnvrme-sunracn Specification of Letters Patent.

Patented Nov. WI, ildlil'f.

To all whom it may concern:

Be it known that ll, JOHN J. HAmwnnL, a citizen of the United States, residin at New York, county of New York, and tate of New York, have inventedcertain new and useful Improvements in Printing-Surfaces, fully described and represented in the following specification and the accompanying drawings, forming a part of the same.

This invention relates to certain improvements in curved printing surfaces of that class in which the plate employed is one page or sheet around the cylinder, this construction having been found to possess cer tain advantages.

In constructions employed for this purpose, the lates are cast tubular, each being substantiailly the lengthbf the sheet or page to be printed, as a newspaper page, for instance. This form of plate necessitates a special construction of press for securing the plates in printing posltion, and, furthermore, such tubular lates require the greatest accuracy in making the plates ready for the press.

It is the object of the present invention to produce a curved printing surface by which these disadvantages of the tubular plate may be avoided and a surface produced which can be applied to a cylinder of ordinary construction and secured thereon by ordinary securing devices, the surface being substantially the size of the sheet or page to be printed. This is accomplished by the present invention by forming the printing surface of two or more curved plates, the meeting edges of which are cast or trimmed to the type line, these plates substantially encircling the cylinder and the total of their printing surfaces producing a single sheet or page. These plates may be produced in any desired manner and may be of any desired number. Preferably, two such plates, will be employed for making up the print-.

ing surface. These plates may be cast either separately or cast tubular, or substantially tubular. When cast in tubular or substantially tubular form, provisionis made for accurately separating the two printing surfaces bycasting a narrow strip of lain metal forming a line on which the tu ular plate may be divided into two parts, the plates after division being trimmed down to type line. When cast singly, the plates may be cast to the type line or narrow margin left, which is afterward trimmed ofi to the type line.

In the accompanying drawing there is illustrated a pair of such printing plates applied to a cylinder. In this drawing- Figure 1 1s a view of a pair of plates in printing position removed from the cylinder;

F1g. 2 is a plan view of a portion of four of such plates, showing one means ofsecuring the plates on the cylinder;

Fig. 3 is a detail sectional View showing, on a large scale, the plates in the position they assume on thecylinder, and

Fig. 4 is a diagrammatic end view of a cylinder with a pair of plates fast thereon.

In these drawings, 1, 2 indicate the two plates, which are shown trimmed and ready for use. These plates are put on a cylinder 10 of ordinary construction, plate 1, for instance, being applied first and firmly seated against a margin bar 3. Plate 2 is then secured on the cylinder. The abutting edges 4-, 5 of the plates are'trimmed to the type line and thetwo plates form a continuous printin surface which is the length of the sheet to e printed. The plates may be secured on the cylinder in any suitable or usual manner. As illustrated, the ends of the plate are beveled and one end takes under a fixed ring 7 on the cylinder and the other beveled edge takes under suitable clamps 8, by which the plates are fastened on the cylinder. The rotation of the cylinder causes the plate 1 to back up against the stop 3 and plate 2 to back up against plate 1, so that the meeting edges of the plates are always held tightly together and a continuous printing surface provided.

While the invention has been shown and described as used with a cylinder of ordinary construction and with convenient means for securing such plates on the cylinder, it will be understood that certain changes and variations, both in production of the plates, and in their manner of use, may be made, without departing from the invention.

What is claimed is 1. In a printing machine, the combination of a plate cylinder and a plurality of curved printing plates thereon disposed around the cylinder, each plate having a printing surface adapted to print part of a page, the edges of said lates being substantially at type-line and a utting to form a continuous printing surface substantially the size of the sai page to be printed, the abutting edges of the plates extending longitudinally of the cylinder.

2, A rinting surface COIIIPIISlIlg a plurality curved printing plates, each plate ada ted to print part of a pa e, the edges of plates being substant1aly at type-lme v and abutting to form a continuous printing surface substantially the size of the pa e to be printed, the abuttin edges of the p ates extending longitudinal y of a support on which the plates are supported.

. 3. A rinting surfaceformed b div1d1ng a curve printing plate into a p urality of sections, the edges of the sectlons at the division point abutting and at such point being substantially at type line, each section of the plate being arranged to print a part of a page and all the section's being arranged to form a continuous printing surface substantially the size of the page to be printed, extending longitudinally of a support on which the sections are sup orted.

In testimony whereof, I ave hereunto set my hand, in t witnesses.

JOHN J. HALLIWELL.

Witnesses:

RICHARD KELLY, v Jon M. W. JORDAN.

e presence of two subscribing 

